WARNING: kernel/sched/core.c:9124 at __might_sleep+0x92/0xf0, CPU#0: syz.1.1047/8383
Modules linked in:

CPU: 0 UID: 0 PID: 8383 Comm: syz.1.1047 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:__might_sleep+0xac/0xf0
Code: 00 00 48 89 3c 24 41 89 f5 4c 8d 35 7e ad c4 0e 43 80 3c 3c 00 74 08 48 89 df e8 af 83 9e 00 48 8b 0b 4c 89 f7 89 ee 48 89 ca <67> 48 0f b9 3a 44 89 ee 48 8b 3c 24 eb b5 44 89 f1 80 e1 07 80 c1
RSP: 0018:ffffc9000645f4f0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff8881131ef1b0 RCX: ffffffff819f9694
RDX: ffffffff819f9694 RSI: 0000000000000001 RDI: ffffffff905aacf0
RBP: 0000000000000001 R08: ffffffff82261f1c R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8ec99d20 R12: 1ffff1102263de36
R13: 0000000000000143 R14: ffffffff905aacf0 R15: dffffc0000000000
FS:  00007f104564a6c0(0000) GS:ffff88818d959000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3490eff8 CR3: 00000001be26c000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 __kmalloc_cache_noprof+0x94/0x660
 spcp8x5_get_msr+0xd3/0x2d0
 spcp8x5_carrier_raised+0x30/0x80
 serial_port_carrier_raised+0x8c/0xc0
 tty_port_block_til_ready+0x449/0x8b0
 tty_open+0x48a/0xcc0
 chrdev_open+0x4d9/0x600
 do_dentry_open+0x816/0x1380
 vfs_open+0x3b/0x340
 path_openat+0x2e44/0x3830
 do_file_open+0x23e/0x4a0
 do_sys_openat2+0x115/0x200
 __x64_sys_openat+0x138/0x170
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f104479e159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f104564a028 EFLAGS: 00000246
 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f1044a25fa0 RCX: 00007f104479e159
RDX: 0000000000000002 RSI: 0000200000000600 RDI: ffffffffffffff9c
RBP: 00007f104483506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1044a26038 R14: 00007f1044a25fa0 R15: 00007ffd4febf888
 </TASK>
